Rotary engine.



PATBNTBD JULY 30, 1907;

W. H. HOOKER. ROTARY ENGINE.

APPLICATION FILED OUT. 4. 1906.

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No. 861,725. P ATENTED JULY 30, 1907.

Y W. H. HOOKER.

ROTARY ENGINE.

I .APPLIGATION FILED 001. 4, 1906.

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UNITED STATES PATENT OFFICE.

WILLIAM H; HOOKER, OF MANCHESTER, NEW HAMPSHIRE.

ROTARY ENGINE.

To all whom it may concern:

Be it known that 1, WILLIAM H. HOOKER, a citizen of the United States,residing at Manchester, in the county of Hillsboro and State of NewHampshire, have invented new and useful Improvements in Rotary Engines,of which the following is a specification.

This invention relates to that class of fluid pressure engines known asrotary engines, and the object is to provide an engine of the characterdescribed which shall be simple, eflicient and economical, the samebeing adapted to the use of either an expansive or a non-expansiveagent.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims thereof.

Referring to the drawings: Figure 1 is a front elevation of my improvedrotary engine. Fig. 2 is a side elevation of the same viewed from theleft of Fig. 1. Fig. 3 is a sectional elevation taken on line 33 of Fig.2 looking toward the left in said figure. Fig. 4 is an enlarged detailperspective view of the valve slide partly broken away. Fig. 5 is alongitudinal section. of the valve slide. Fig. 6 is a section on line 66of Fig. 1. Fig. 7 is asection on line 77 of Fig. 1.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 10 is a casing provided with two cylindrical pistonchambers 11 and 12 located in opposite sides thereof. Cover plates 13and 14 are bolted to opposite sides, respectively, of the casing 10. Thecover plate 13 is provided with an annular groove 15 in which is locateda packing ring 16 formed of any suitable material and similarly thecover plate 14 is provided with an annular groove 17 in which is locateda packing ring 18.

Located within the piston chamber 11 is a rotary pisten 19 and locatedwithin the piston chamber 12 is a rotary piston 20. The rotary pistons19 and 20 are provided with hubs 21 and 22, respectively, said hubsabutting face to face. An annular washer or packing ring 23 surroundssaid hubs 'and prevents leakage of fluid from one to the other of thepiston chambers 11 and 12. An exhaust passage 24, formed in the casing10, is connected to the piston chambers 11 and 12. The rotary pistons 19and 20 are keyed to a shaft 25 to which a fly-wheel 26 and a cam 27 arealso fast. The cam 2'7 is adapted to impart a reciprocatory movement toa valve-slide 28 on which is formed an admission valve 29 and a guideblock 30. Stop valves 31 and 32 are mounted on the valve-slide 28 andare arranged to yield relatively thereto, said stop-valve 31 beingprovided with a spring 33 and said stop-valve 32 being provided with aspring 34, said springs acting to press said stop-valves downwardlyagainst the peripheries of the rotary pistons 19 and 20, respectively,and there- Speeification of Letters Patent. Application filed Octoli'er4,1906. Serial No. 337,404.

by preventing leakage of steam between the periph- Patented July 30,1907.

eries of said pistons and their respective stop-valves. As the pistons19 and 20 and the stop-valves 31 and 32- bccsme worn, their respectivesprings 33 and 34 take up the wear and thus always prevent leakage ofsteam.

A valve-chest 35, forming a part of the casing 10, is provided with avalve-chamber 36 formed therein in which the admission valve 29 isadapted to be moved right or left (Figs. land 3). An inlet pipe 37 isadapted to convey fluid to the valve chamber 36, said fluid being eithersteam, water, air or the like as may be desired. The admission valve 29,as it is moved toward the right and left by the cam 27, is adapted todirect fluid from the valve chamber 36 into the piston cham bers 11 and12 alternately. The guide-block 30 is guided in a recess 38 formed inthe valve-chest 35.

The rotary piston 19 is provided with a projection 39 extending from theperiphery thereof, said projecs tion being provided with packing blades40 and 41, each of which bears against the interior periphery of thepiston chamber 11 and against the sides thereof. The rotary piston 20 isprovided with a projection 42 extending from the periphery thereof,saidprojection being provided with packing blades 43 and 44, each ofwhich bears against the interior periphery of the piston chamber 12 andagainst the sides thereof. The packing blades 40, 4]., 43 and 44 may beformed of any suitable material which will prevent leakage of fluid pastsaid blades. d

When the valve-slide 28 is reciprocatedby the cam 27, the stop-valves 31and 32 are moved into and out of the paths of the projections 39 and 42,respectively, it being understood that when the stop-valve 31 is movedinto contact with the periphery of the rotary piston 19, the stop-valve32 is moved out of contact with the periphery of the rotary piston 20and vice versa. The stop-valve 31 when in contact with the periphery ofthe rotary piston 19, as illustrated in Fig. 6, forms an abutmentagainst which the fluid acts, said fluid being under pressure acting tomove the projection 39 away from said stop-valve, thereby imparting arotary movement to the piston 19.

If a non-expansive agent be employed the admission valve 29 may remainin the position shown in Fig. 3 until the projection 39 reaches theexhaust passage 24, said projection 39, in passing said exhaust passage,allowing the fluid to pass outwardly therethrough, but if an expansiveagent be employed the admission valve 29 may be closed before saidprojection 39 has reached said exhaust passage, thereby allowing theimprisoned expansive fluid to expand until said projection has passedsaid exhaust passage. Similarly when the valve 29 is moved to theposition shown in dotted lines (Fig. 3) the fluid is permitted to passthrough the inlet pipe 37 into the piston chamber 12, saidfluid actingon the projection 42 of the piston 20 in the same manner as described inconnection with the projection 39 of the rotary piston 19. Thestop-valve 31, when moved out I Having thus described my invention, WhatI claim of engagement with the periphery of the rotary piston 19, passesinto a recess 45 formed in the cover plate 13 and in like manner thestop-valve 32, when moved out of engagement with the periphery of therotary piston 20, passes into a recess 46 formed in the cover plate 14.The metal forming the bottom of the recess 45 is beveled downwardly at45 and the metal forming the bottom of the recess 46 is beveleddownwardly at 46, as shown in Fig. 3. The bottom of the recess 51 islower than the bottom of the recess 45 and similarly the bottom of therecess 52 is lower than that of the recess 46. By reason of the bevels45 and 46 and the location of the bottom of the recesses 51 and 52 asabove described the stop-valves 31 and 32 are free to be pressed intoclose contact with the peripheries of the pistons 19 and 20,respectively, by their respective springs 33 and 34. As the pistons 19and 20 become reduced in diameter because of wear, the stop valves 31and 32 still press against the peripheries of their respective pistons19 and 20 and thus at all times prevent leakage of steam between theperipheries of said pistons and their respective stop valves. For theproper lubrication of the pistons 19 and 20, oil may be fed in anysuitable manner to oil chambers 47, 48, 49 and 50. The valve slide 28 isprovided with oil slots 53 and 54 extending therethrough.

When the stop-valve 31 is in its extreme right-hand position, itslelt-hand side is still in engagement with the recess 45 and itsright-hand side is in engagement with a shallow recess 51. By reason ofthis construction, leaking of fluid past the sides of the stop-valve iseffectually prevented. Similarly when the stop-valve 32 is in itsextreme left-hand position its right-hand side is still in engagementwith the recesses 46 and its left-hand side is in engagement with ashallow recess 52.

nand desire by Letters Patent to secure is:

1. In a rotary fluid pressure engine, a casing provided with a pistonchamber and two recesses located on opposite sides, respectively,thereof, a cylindrical rotary piston located in said chamber, saidpiston provided with a projection extending from its periphery, anadmission valve adapted to admit fluid to said chamber, a slide adaptedto reciprocate longitudinally of the axis of rotation of said piston, astop-valve carried by said slide, and a spring adapted to press saidstop-valve toward said piston, said stop-valve adapted to engage both ofsaid recesses si1nultaneously, said recesses being so formed andarranged that said stop-valve when in engagement therewith is adapted tobe pressed by said spring against the periphery of said piston.

2. In a rotary fluid pressure engine, a casing provided with two pistonchambers, cylindrical rotary pistons located in said chambers,respectively, each of said pistons provided with a projection extendingfrom its respective periphery, an admission valve adapted to admit fluidto said chambers alternately, a slide adapted to reciprocatelongitudinally of the axes of said pistons, two stop-valves carried bysaid slide, and springs adapted to press said stop-valves against theperipheries of said pistons, respectively.

In a rotary fluid pressure engine, a casing provided with two pistonchambers, cylindrical rotary pistons located in said chambers,respectively, each of said pistons provided with a projection extendingfrom its respective periphery, an admission valve adapted to admit fluidto said chambers alternately, a slide adapted to reciprocatelongitudinally of the axis of said pistons, said slide pro vidcd withtwo recesses, two stop-valves located in said recesses, respectively,and springs adapted to press said stop-valves against the periphery ofsaid piston, respec- WILLIAM H. HOOKER.

Witnesses CHARLES S. GOODING, ANNIE .T. DAILEY.

